Tuesday, December 27, 2005

Up Open, Down Day

Tuesday's market (SPY) opened up, but then closed down over 1% on the day. Since January, 2003 (N = 750), we've had 80 days in which SPY has fallen by 1% or more. The next day, the market is up on average by .24% (50 up, 30 down), which is stronger than the average gain of .05% (415 up, 335 down).

Interestingly, however, when the down day in SPY started the day by opening to the upside (N = 23), the average change the next day is -.02% (13 up, 10 down). When the down day opened down and stayed weak (N = 57), the average next day change is .35% (37 up, 20 down). It thus appears that days that start strong (such as Tuesday), but become weak are more likely to show followthrough weakness the next day that markets that are weak throughout the day. One way of looking at this is that markets opening up are trapping the buyers, while markets that open down trap the sellers the following day.

About Me

Author of The Psychology of Trading (Wiley, 2003), Enhancing Trader Performance (Wiley, 2006), The Daily Trading Coach (Wiley, 2009), and Trading Psychology 2.0 (Wiley, 2015) with an interest in using historical patterns in markets to find a trading edge. As a performance coach for portfolio managers and traders at financial organizations, I am also interested in performance enhancement among traders, drawing upon research from expert performers in various fields. I took a leave from blogging starting May, 2010 due to my role at a global macro hedge fund. Blogging resumed in February, 2014, along with regular posting to Twitter and StockTwits (@steenbab). I teach brief therapy as Clinical Associate Professor at SUNY Upstate in Syracuse, with a particular emphasis of solution-focused "therapies for the mentally well". Co-editor of The Art and Science of Brief Psychotherapies (American Psychiatric Press, 2012). I don't offer coaching for individual traders, but welcome questions and comments at steenbab at aol dot com.